package com.tgb.filter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.login.model.LoginDo;
import com.tgb.util.CookiesUtil;

 public class CommonInterceptor extends HandlerInterceptorAdapter{  
	private Logger log = Logger.getLogger(CommonInterceptor.class);
    public static final String LAST_PAGE = "com.alibaba.lastPage";  
    /* 
     * 利用正则映射到需要拦截的路径     
      
    private String mappingURL; 
     
    public void setMappingURL(String mappingURL) {     
               this.mappingURL = mappingURL;     
    }    
  */  
    /**  
     * 在业务处理器处理请求之前被调用  
     * 如果返回false  
     *     从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 
     * 如果返回true  
     *    执行下一个拦截器,直到所有的拦截器都执行完毕  
     *    再执行被拦截的Controller  
     *    然后进入拦截器链,  
     *    从最后一个拦截器往回执行所有的postHandle()  
     *    接着再从最后一个拦截器往回执行所有的afterCompletion()  
     */    
    @Override    
    public boolean preHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler) throws Exception {    
        if ("GET".equalsIgnoreCase(request.getMethod())) {  
           // RequestUtil.saveRequest();  
        }  
      //  log.info("==============执行顺序: 1、preHandle================");    
        String requestUri = request.getRequestURI();  
        String contextPath = request.getContextPath();  
        String url = requestUri.substring(contextPath.length());  
        
//        log.info("requestUri:"+requestUri);    
//        log.info("contextPath:"+contextPath);    
//        log.info("url:"+url);    
          
        LoginDo l =  (LoginDo)request.getSession().getAttribute("user");   
        if(l == null){  
       //     log.info("Interceptor：跳转到login页面！");  
        	CookiesUtil.setCookie(response, "12121", "1212", 10000);
        	
            request.getRequestDispatcher("/login.jsp").forward(request, response);  
            return false;  
        }else  {
        	
        	CookiesUtil.setCookie(response, "12121", "1212", 10000);
        	 return true;     
        }
        	
           
    }    
    
    /** 
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作    
     * 可在modelAndView中加入数据，比如当前时间 
     */  
    @Override    
    public void postHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler,    
            ModelAndView modelAndView) throws Exception {     
      //  log.info("==============执行顺序: 2、postHandle================");    
        if(modelAndView != null){  //加入当前时间    
            modelAndView.addObject("var", "测试postHandle");    
        }    
    }    
    
    /**  
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等   
     *   
     * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()  
     */    
    @Override    
    public void afterCompletion(HttpServletRequest request,    
            HttpServletResponse response, Object handler, Exception ex)    
            throws Exception {    
     //   log.info("==============执行顺序: 3、afterCompletion================");    
    }    
  
}    